Official Certification Course

Become a java Developer

Master java with our comprehensive, free interactive course. Pass the exam to earn your industry-recognized certificate. Includes interactive examples, quizzes, and a verifiable digital certificate upon completion.

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Course Syllabus

2Java Exercises

6Introduction to Java

7Java Getting Started

9Java Statements

10Java Output Values / Print Text

11Java Output Numbers / Print Numbers

12Java Comments

13Java Variables

14Java Declare Multiple Variables

15Java Identifiers (Variable Names)

16Java Constants (final keyword)

17Java Variables Real-Life Examples

18Java Data Types

20Java Boolean Data Types

21Java Data Types Characters

22Java Data Types Real-Life Example

23Java Non-Primitive Data Types

24Java var Keyword

25Java Type Casting

26Java Operators

27Java Arithmetic Operators

28Java Assignment Operators

29Java Comparison Operators

30Java Logical Operators

31Java Operator Precedence

33Java Strings Concatenation

34Java Numbers and Strings

35Java Strings - Special Characters

37Java Booleans

38Java If ... Else

39Java The else Statement

40Java The else if Statement

41Java Short Hand If...Else (Ternary Operator)

42Java Nested If Statements

43Java Logical Operators in Conditions

44Java Real-Life If Else Examples

46Java While Loop

47Java Do/While Loop

48Java Real-Life While Loop Examples

49Java For Loop

50Java Nested Loops

51Java For-Each Loop

52Java Real-Life For Loop Examples

53Java Break and Continue

55Java Loop Through an Array

56Java Arrays - Real-Life Examples

57Java Multi-Dimensional Arrays

59Java Method Parameters

60Java Return Values

61Java Method Overloading

63Java Recursion

64Java OOP (Object-Oriented Programming)

65Java Classes and Objects

66Java Class Attributes

67Java Class Methods

68Java Constructors

70Java Modifiers

71Java Non-Access Modifiers

72Java Encapsulation and Getters and Setters

73Java Packages

74Java Inheritance (Subclass and Superclass)

75Java Polymorphism

77Java Inner Class (Nested Class)

78Java Abstraction

79Java Interface

80Java Anonymous Class

81Java Enum Constructor

82Java User Input (Scanner class)

83Java Date and Time

85Java Debugging

86Java Exceptions (Try...Catch)

87Java Multiple Exceptions

88Java try-with-resources

90Java Create Files

91Java Write To Files

92Java Read Files

93Java Delete Files

94Java I/O Streams (Input/Output Streams)

95Java FileInputStream

96Java FileOutputStream

97Java BufferedReader

98Java BufferedWriter

99Java Data Structures

100Java Collections Framework

102Java ArrayList

103Java LinkedList

104Java Sort a List - List Sorting

106Java HashSet

107Java TreeSet

108Java LinkedHashSet

110Java HashMap

111Java TreeMap

112Java LinkedHashMap

113Java Iterator

114Java Algorithms

115Java Wrapper Classes

116Java Generics

117Java Annotations

118Java Regular Expressions

119Java Threads

120Java Lambda Expressions

121Java Advanced Sorting (Comparator and Comparable)

122Java Projects and Practical Applications

123Java How Tos

124Java How To Add Two Numbers

125Java How To Swap Two Variables

126Java How to Check Whether a Number is Even or Odd

127Java How To Reverse a Number

128Java How To Find Out if a Number is Positive or Negative

129Java How To Find the Square Root of a Number

130Java How To Calculate the Area of a Rectangle

131Java How To Convert Celsius to Fahrenheit

132Java How To Sum of Digits of a Number

133Java How To Check Armstrong Number

134Java How To Generate Random Numbers

135Java How To Count Number of Words

136Java How To Count Vowels in a String

137Java How To Remove Vowels from a String

138Java How To Count Digits in a String

139Java How To Reverse a String

140Java How To Check if a String Is a Palindrome

141Java How To Check Anagram Strings

142Java How To Convert a String to an Array

143Java How To Remove Whitespace from a String

144Java How To Count Character Frequency in a String

145Java How To Calculate the Sum of Array Elements

146Java How To Calculate the Average of an Array

147Java How To Sort an Array

148Java How To Find the Smallest Element in an Array

149Java How To Find the Largest Element in an Array

150Java How To Find the Second Largest Element in an Array

151Java How To Find the Minimum and Maximum Element in an Array

152Java How To Merge Two Arrays

153Java How To Remove Duplicates from an Array

154Java How To Find Duplicate Elements in an Array

155Java How To Shuffle an Array

156Java How To Calculate Factorial of a Number

157Java How To Generate Fibonacci Sequence

158Java How To Find the Greatest Common Divisor (GCD)

159Java How To Check if a Number Is Prime

160Java How To Loop Through an ArrayList

161Java How To Loop Through a HashMap

162Java How To Loop Through an Enum

163Java String Reference

164Java Math Reference

165Java Output (System.out) Reference

166Java Arrays Reference

167Java ArrayList Reference

168Java LinkedList Reference

169Java HashMap Reference

170Java Scanner Class Reference

171Java File Reference

172Java FileInputStream Reference

173Java FileOutputStream Reference

174Java BufferedReader Reference

175Java BufferedWriter Reference

176Java Iterator Reference

177Java Collections Reference

178Java System Reference

179Java Error and Exception Types Reference

181Java Online Compiler (Editor / Interpreter)

182Create Java Server | W3Schools.com | W3Schools Spaces

183Java Syllabus (Curriculum)

184Java Study Plan (Lesson Plan)

185Java Interview Questions

186W3Schools Java Certificate

187Java Exercises

188Java Exercises

190W3Schools Java Certificate

191Java Syllabus (Curriculum)

Certificate of Completion

Pass the exam with 70% or higher to earn your official, verifiable certificate.

Exam Duration30 Mins

Questions20-30

Passing Score70%

Why learn java?

High demand in the job market
Core technology for web development
Foundation for advanced frameworks